Fountain-pen.



PATENTED JULY'ZB, 1608.

No. 894,667. y

- 0. W. KNAPP.

FOUNTAIN PEN.

' APPLIOATION FILED SEPT. 13, 1907.

a piston movable nnrr airs rice.

CHARLES W: KNAPP, OF BROOKLYN, NEW YORK, ASSIGNOR TO NATHAN H.CASPERFELD, OF

NEW YORK, N. Y. I

FOUNTAIN-PEN.

Specification of Letters Patent.

Patented July 28, 1908.

Application filed September 13, 1907. Serial No. 392,607.

To all whom it may concern: V

Be it known that I, CHARLES W. KNAPP, a citizen of the United States,residing at the borough of Brooklyn, in the county of Kings and State ofNew York, have invented an Improvement in Fountain-Pens, of which thefollowing is a specification.

My invention relates to an improvement in fountain without separationand the use of the usual filling device for placing the ink therein, andthe object of my invention is to simplify the construction by lesseningthe number of parts and to increase the efiiciency and to reduce thepossibility of leakage to a minimum In carrying out my invention, theink is drawn into the barrel or reservoir part of the handle at the penend and past the pen by the longitudinal movement of a member within thebarrel which in turn is rotated to movement by a revoluble member towhich it is secured.

The device ofmy improvement comprises the barrel or cylindricalreservoir for the ink, along within the same, a piston-rod connected atdne spirally rooved lston and movable through one end to t 1e end of theend is a pin impart rotation thereto with the longitudinal movement, andI employ an external tubular member to which the outer end of the saidsecured and by which the neoplston-rod is essary force is employed tomove the piston and rod longitudinally.

The ink is drawn in at the pen end of the I barrel or cylinder by thelongitudinal movement of the piston between itsextremes of movement,thus creating a vacuum into which the ink flows to fill the barrel andthe piston is so made that no ink passes by the same in use. The pen maybe cleansed by the longitudinal movement of the piston drawing in andforcing out the cleansing water.

In the drawing, Figure '1 is a longitudinal section in large sizeshowing the details of my improvement. Fig. 2 is a longitudinal sectionof the barrel or ink holding cylinder and the tubular end, Fig. 3, is anelevation and. longitudinal section of the spirally grooved piston-rodand the parts connected therewith and forming the piston, and Fig. 4 isa longitudinal section of theslecve norwhich devices form pens of theclass adapted to be filled arrel or cylinder and in which. taking 1ntosaid groove so as to,

and spirally mally employed upon the pen end of the fountain pen tocover and protect the pen. (it represents the barrel or ink holdingcylinder tapered at the left hand end as shown in the drawing andperforated to receive a pen I) and the devices for holding the same, noessential partof my I resent invention.

arrel a is open-ended and is fitted with a sleeve a through which sleeveand the barrel extends a pin 6 having a rounded end adapted to fit inthe spiral groove of the piston rod (1. The piston c is composed of acork member 2 snugly fitting within the barrel a u on the reduced end dof the piston-rod. 'lhis reduced end d is threaded to receive the, nut 3which clamps the cork sleeve member against the end of the piston-rodand holds the same snugly in place. fits snugly within the sleeve a sothat there is no looseness and as the cork filling or sleeve 2 fitssnugly within the barrel (4 no ink can pass between the same and thebarrel to the rear of the. said piston.

e represents a tubular revoluble end adapted to fit over the barrel (1and the same is shouldered at its extreme end and adapted to receive thesleeve f. This reduced shoul dered end e of the tubular ortion e agreesin diameter with the barre a so that the sleeve fis adapted to fiteither upon the end e when the pen is in use, or to cover the pen I) andbeheld to the barrel a when the fountain pen is not in use and it isdesired to protect the pen.

The end of the spirally grooved piston-rod d is received'in an apertureformed Within The piston-rod d the end of the tubular member ,e and apin 4 r is employed to fasten this tubular member to the piston-rod.

In the'operation of the device, Fig. 1 shows by dotted lines the pistonat its nearest approach toithe pen I). end of the fountain pen .is to bedipped into the supply of ink. The tubular memben e grooved piston-rodCl are then rotated and simultaneously the piston c is movedlengthwiseof the barrelor 111k holding cylinder a as faras theconstruction of the parts will permit of the movement. This act producesa vacuum within the barrel which with the longitudinal movement of thepiston In this position-thepen the ink flows in to fill, so that whenthe piston reaches its extreme movement to the right hand of the barrelas shown, the same is filled with ink,

In writing with the fountain pen, the ink flows out and its place istaken by the entrance of air, and when the su ply of ink is exhaustedthe revoluble mem er e of the iston-rod and piston are turned so as toring the piston again near to the pen so as to repeat the operation anddraw in a fresh supply of ink.

In the use of this instrument as with other fountain pens, the user isresumed to kee the pen upright in the poo at or on the des i so that theink will not flow out accidentally by gravity or capillary action, andwhen not in use the pen is supposed to be covered by the sleeve f whichis transferred from the pen end to the reduced" shouldered end 0 of thetubular member a,

In view of the fact that the piston fills the cylinder or barrel a, ,noink can pass by the same as this cork piston acts the same as thecorkinabottle to retain the ink in position, consequently the ink willnot escape through the sleeve a of the barrel along the spiral groove ofthe piston-rod where it can injure clothing or soil the fingers, or beotherwise detrimental.

I claim asmy invention:

1. A ioudtain pen comprising an inkholding cylinder having a smoothinterior and with a pen in one end, a piston fitting the said cylinderand means manually actuated for imparting to the piston both alongitudinal and rotary movement for drawing in the ink' at the penendof the said cylinder.

2. In a fountain pen, the combination with an ink holding cylinder and apen connected therewith at one end, of a sleeve in the opposite end ofsaid cylinder and a pin passing through said sleeve and cylinder andprojecting within the same, a piston fitting the said eases":

cylinder, a iston-rod connected I therewith and provide with aspiral'groove into which the aforesaidpin extends, a tubular memberreceiving the free end of the piston-rod and means for connectingsaidarts, whereby with the rotation of the tubu ar member the istonandpiston-rod are rotated and moved ongitudinally.

3. In a fountain pen the combination with an ink holding cylinder and apen connected therewith at one end, of a sleeve in the oppomeans forconnecting said parts, whereby with the rotation of the tubu ar memberthe i ston and piston-rod are rotated and moved longitudinally. t

- 4. A fountain pen comprising an ink-holding cylinder having a. smoothinterior and ta pered at one' end and a'pen fitting the said end, apiston within said cylinder, a pistonrod secured to the piston, atubular member to which the opposite end of the piston-rod is connectedand by which a rotar Y movement is imparted to the piston and piston rodand means by which a longitudinal move ment is simultaneously impartedto the piston and piston-rod to draw in the ink at the pen end of thesaid cylinder.

Signed by me this 6th day of September CHARLES W. KNAPP. Witnesses:

ARTHUR H. SERRELL, E. ZAcnAmAsnN.

